批量比较两个字符串 [英] Comparing two strings in batch

问题描述

当前，我正在编写一个批处理文件以接受参数，并根据参数值跳转到文件的特定部分.我的代码如下:

Currently I am writing a batch file to accept a parameter and jump to a specific part of the file based on the parameter value. The code I have is as follows:

SET param = %~n1

IF "%param%"=="q" GOTO :QUICK
IF "%param%"=="t" GOTO :THOROUGH
IF "%param%"=="b" GOTO :BOOT
IF "%param%"=="f" GOTO :FIX
IF "%param%"=="" GOTO :INVALID


:QUICK
echo "Quick"
pause
exit

:INVALID
echo "Invalid"
pause
exit

:BOOT
echo "Boot"
pause
exit

:FIX
echo "Fix"
pause
exit

:THOROUGH
echo "Thorough"
pause
exit

脚本唯一可以接受的参数是/q，/t，/b或/f (或不带/)，并且当提供了错误的参数时，它应该跳到 INVALID .当我使用无效的参数运行它时，它可以工作，但是，如果我提供了正确的参数(例如， file.bat t )，结果将无法正常运行，并最终直接转到 INVALID .我尝试使用％param％" EQ"q" ，并在进行比较之前将 q 设置为变量，但是我没有运气得出结果这样可行.

The only parameters the script should accept are /q, /t, /b or /f (or without /), and when an incorrect parameter is supplied, it should jump to INVALID. When I run it with an invalid parameter, it works, however, if I supply a parameter that is correct (for example, file.bat t) the result fails to work as I hope, and ends up going directly to INVALID. I have tried using "%param%" EQ "q", and setting q to a variable before doing the comparison, but I have had no luck coming up with a result that works.

推荐答案

您没有参数％param％.但是您有一个名为％param< space>％的参数，它的值不是 q ，而是< space> q

you don't have a parameter %param%. But you have a parameter named %param<space>% And it's value isn't q, but <space>q

编写您的 set 命令，不要带空格:

Write your setcommand without spaces:

set param=%~n1

甚至更好(以避免在末尾出现意想不到的空格):

or even better (to avoid unintended spaces at the end):

set "param=%~n1"

注意:如果/i％param％" =="q"

Note: you can make your parameters case independent with if /i "%param%"=="q"

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